Marquise|Natural|GIA

1.20ct D SI1 Marquise Natural Diamond

ID • D/SI1 • GIA 2557626736

Certificate GIA 2557626736

Diamond specifications and retailer prices

From $6,283 USD
As of November 4, 2026
Save $4,769 USD (43%) vs most expensive(unlock to see where)
15 retailers carry this diamond
Most expensive: $13,300 USD at NZ Jewellers · As of November 5, 2026
View at NZ Jewellers

About this 1.2ct natural marquise diamond

This 1.2ct natural marquise sits in the classic one-carat band, graded D colour (colourless) and SI1 clarity (slightly-included), with a top-tier cut grade stated by the retailer rather than the lab and certified by GIA 2557626736. Listed at 15 retailers as of November 4, 2026, with a 76% spread between the cheapest and most expensive listing. That is exactly the kind of price-discovery gap Carat Hunter was built to surface. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.20
Carat
D
Color
SI1
Clarity
Ideal
Cut (retailer stated)

Specifications

Cut (retailer stated)Ideal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
Crown angle37.35°
Pavilion angle41.78°
OriginNatural
Grading LabGIA
CertificateGIA 2557626736
Dimensions10.77 × 5.47 × 3.53 mm
L/W Ratio1.97
Girdle conditionThick
Culet sizeNone
Key to symbols
Crystal, Feather, Natural
Top View
10.77 mm5.47 mm1.20 ctD / SI1
OriginNatural
CutIdeal
PolishExcellent
SymmetryExcellent
FluorescenceMedium
CertificateGIA 2557626736
Side View
Table 61.0%Crown 37.35°GirdlePavilion 41.78°Culet: NoneDepth 64.6%

Caratlytics Score

How it works →
B+
Very Good
Strong quality and value balance
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 4
Current: $7,715 USD|Low: $7,424 USD|High: $11,216 USD|Avg: $8,636 USD|-1.7%
Retailer 1
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
November 6, 2026
Retailer 3$7,425 USD
Retailer 6$7,668 USD
Retailer 1$7,715 USD
Retailer 2$8,640 USD
Retailer 4$9,701 USD
Retailer 5$11,052 USD

37 data points across 6 retailers

15 retailers$6,283 USD to $11,052 USD

B+
Cheapest Retailer
-
$6,283 USD
Retailer 2
-
$6,650 USD
View
Price last confirmed 8 days ago
B
Retailer 3
-
$6,706 USD
View
B
Retailer 4
-
$7,204 USD
View
B
Retailer 5
-
$7,315 USD
View
B
Retailer 6
-
$7,425 USD
View
B
Retailer 7
-
$7,625 USD
View
Retailer 8
-
$7,668 USD
View
Price last confirmed 15 days ago
B
Retailer 9
-
$7,715 USD
View
B
Retailer 10
-
$8,313 USD
View
B
Retailer 11
-
$8,640 USD
View
Retailer 12
-
$8,760 USD
View
Price last confirmed 14 days ago
B
Retailer 13
-
$9,701 USD
View
B
Retailer 14
-
$11,052 USD
View
Most Expensive
NZ Jewellers
e598eb48-456e-4347-a78a-4cc5790481a2 · Nov 5
$13,300 USD
View
Price under review
14 more retailers have this diamond
Prices start from $6,283 USDSave up to $4,769 USD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

B+
1.20ct Marquise
$6,283 USD